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Keeping it wild: how mules help preserve the last untamed places in the US | Environment | The Guardian
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A): Mules for transporting lab equipment. (B): Carrying equipment to a... | Download Scientific Diagram
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Mules carry camping equipment over the Salkantay pass on a trek to Machu Picchu in the Andes of Peru Stock Photo - Alamy
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Two Pack Mules Transporting Trekking Equipment from the Quebrada Santa Cruz in Peru with Pucaraju Snowy Mountain Stock Image - Image of heavy, climbing: 180125581
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